mountain ranges often appear on the edges of continents. what theory does this support?\nmountains were…

mountain ranges often appear on the edges of continents. what theory does this support?\nmountains were formed when earths crust cooled and earth shrank.\nmountain ranges were formed when continents collided.\nmountain ranges did not exist millions of years ago.\nmountain ranges were formed only by glaciers.
Answer
Brief Explanations:
The theory of plate - tectonics states that when continental plates collide, the crust is pushed up to form mountain ranges. Mountain ranges often appearing on the edges of continents supports the idea that they were formed when continents collided. The other options are incorrect as the cooling - shrinkage theory is an old and disproven idea, mountain ranges have existed for millions of years, and glaciers are not the only cause of mountain - range formation.
Answer:
Mountain ranges were formed when continents collided.